Module:IPAddress

Module documentation This module is copied from the English Wikipedia page en:Module:IPAddress. It has no documentation, and relevant information may be found at the corresponding English Wikipedia documentation page. For more details see the editing history of the module. The above documentation is transcluded from Module:IPAddress/doc.

---

local p = {}

function p._isIpV6(s)
	local dcolon, groups
	if type(s) ~= "string"
		or s:len() == 0
		or s:find("[^:%x]") -- only colon and hex digits are legal chars
		or s:find("^:[^:]") -- can begin or end with :: but not with single :
		or s:find("[^:]:$")
		or s:find(":::")
	then
		return false
	end
	s, dcolon = s:gsub("::", ":")
	if dcolon > 1 then return false end -- at most one ::
	s = s:gsub("^:?", ":") -- prepend : if needed, upper
	s, groups = s:gsub(":%x%x?%x?%x?", "") -- remove valid groups, and count them
	return ( (dcolon == 1 and groups < 8) or (dcolon == 0 and groups == 8) )
		and ( s:len() == 0 or (dcolon == 1 and s == ":") ) -- might be one dangling : if original ended with ::
end

function p._isIpV4(s)
	local function legal(n) return (tonumber(n) or 256) < 256  and not n:match("^0%d") end
	if type(s) ~= "string" then return false end
	local p1, p2, p3, p4 = s:match("^(%d+)%.(%d+)%.(%d+)%.(%d+)$")
	return legal(p1) and legal(p2) and legal(p3) and legal(p4)
end

function p._isIp(s)
	return p._isIpV4(s) and "4" or p._isIpV6(s) and "6"
end

function p._isIpOrRange(s)
	local modip = require('Module:IP')
	local success, ip = pcall(modip.IPAddress.new, s)
	if success then
		return 'ip'
	end
	success, ip = pcall(modip.Subnet.new, s)
	if success then
		return 'range'
	end
	return ''
end

local function input(frame)
	-- Return input parameter after replacing any of following directional markers.
	-- LRM : LEFT-TO-RIGHT MARK (U+200E)         : hex e2 80 8e = 226 128 142
	-- LRE : LEFT-TO-RIGHT EMBEDDING (U+202A)    : hex e2 80 aa = 226 128 170
	-- PDF : POP DIRECTIONAL FORMATTING (U+202C) : hex e2 80 ac = 226 128 172
	-- This is required for MediaWiki:Blockedtext message.
	return (frame.args[1] or ''):gsub('\226\128[\142\170\172]', ' ')  -- replace LRM, LRE, PDF with space delimiter
end

function p.isIpV6(frame) return p._isIpV6(input(frame)) and "1" or "0" end
function p.isIpV4(frame) return p._isIpV4(input(frame)) and "1" or "0" end
function p.isIp(frame) return p._isIp(input(frame)) or "" end

function p.isIpOrRange(frame)
	-- {{#invoke:IPAddress|isIpOrRange|x}} → 'ip' (IPv4/IPv6) or 'range' (CIDR IPv4/IPv6) or '' (invalid)
	return p._isIpOrRange(input(frame))
end

return p